Options for the SELEX state D$_{s\J}^+(2632)$

Abstract

We consider possible assignments for the D$_{s\J}^+(2632)$, which was recently reported in D${}_s^{+}\eta$ and D${}^0$K${}^{+}$ final states by the SELEX Collaboration at Fermilab. The most plausible quark model assignment for this state is the first radial excitation ($2^3{\S }_1$) of the $c\bar{s}$ D${}_s^{\ast }(2112)$, although the predicted mass and strong decay branching fractions for this assignment are not in agreement with the SELEX data. The reported dominance of D${}_s\eta$ over DK appears especially problematic. An intriguing similarity to the K${}^{\ast }(1414)$ is noted. $2^3{\S }_1$--$^3\D_1$ configuration mixing is also considered, and we find that this effect is unlikely to resolve the branching fraction discrepancy. Other interpretations as a $c\bar{s}$-hybrid or a two-meson molecule are also considered, but appear unlikely. Thus, if this state is confirmed, it will require reconsideration of the systematics of charmed meson spectroscopy and strong decays.

6 revtex4 pages, 2 eps figures

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Cited by in corpus (22)

• The New Heavy Mesons: A Status Report
• Dynamics and Decay of Heavy-Light Hadrons
• New Hadron States
• Strong decays of heavy-light mesons in a chiral quark model
• The antinucleon-nucleon interaction at low energy : annihilation dynamics
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• The coupled-channel analysis of the D and D_s mesons
• Open-charm meson spectroscopy
• Charm meson resonances and D to V semileptonic form factors
• Possible 2S and 1D charmed and charmed-strange mesons
• Implication of BaBar's new data on the $D_{s1}(2710)$ and $D_{sJ}(2860)$
• Interpretation of $D_{sJ}(2632{)}^{+}$, $D_{s1}(2700{)}^{\pm }$, $D_{sJ}^{\star }(2860{)}^{+}$ and $D_{sJ}(3040{)}^{+}$
• Is $D_{sJ}^{+}(2632)$ the first radial excitation of $D_s^{\ast }(2112)$?
• Regge Trajectories Analysis to DsJ(2317), DsJ(2460) and DsJ(2632) Mesons
• Review of Heavy Hadron Spectroscopy
• Chiral SU(3) Quark Model Study of Tetraquark States: $cn\bar{n}\bar{s}/cs\bar{s}\bar{s}$
• Masses and Mixing of $cq\bar{q}\bar{q}$ Tetraquarks Using Glozman-Riska Hyperfine Interaction
• Possible Interpretations of $D_{sJ}^{+}(2632)$ If It Really Exists
• Towards an Understanding of the New Charm and Charm-Strange Mesons
• The Possible $J^{PC}{I}^G=2^{++}{2}^{+}$ State X(1600)
• The SELEX Measurements in the Unified Picture for Hadron Spectra
• The newly observed state $D_{s0}(2590{)}^{+}$